Question

An element having an atomic radius of 0.14 nm crystallizes in an fcc unit cell. What is the length of a side of the cell?

विकल्प

• 0.56 nm

• 0.24 nm

• 0.96 nm

• 0.4 nm

Answer 1

0.4 nm

Explanation:

For an fcc unit cell

r = `(sqrt2"a")/4`

a = `(4"r")/sqrt2`

= `2sqrt2 xx 0.14`

= 0.39

≈ 0.4 nm